Finding the Fourth Proportional to 76,464, 105,520.32 and 42,930.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,464 : 105,520.32 = 42,930.72 : x
2. Step 2: Convert to fraction form
   76,464/105,520.32 = 42,930.72/x
3. Step 3: Cross multiply
   76,464x = 105,520.32 × 42,930.72
4. Step 4: Simplify right side
   76,464x = 4,530,063,312.23
5. Step 5: Solve for x
   x = 4,530,063,312.23/76,464
6. Step 6: Final answer
   x = 59,244.39